From 26e3e98ff0e222a9fb9226938ac6902af77921bd Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Tue, 3 May 2022 11:38:07 +0200
Subject: Support live session in server

---
 server/lib/live/live-manager.ts | 64 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 53 insertions(+), 11 deletions(-)

(limited to 'server/lib/live/live-manager.ts')

diff --git a/server/lib/live/live-manager.ts b/server/lib/live/live-manager.ts
index da09aa05c..df2804a0e 100644
--- a/server/lib/live/live-manager.ts
+++ b/server/lib/live/live-manager.ts
@@ -17,10 +17,11 @@ import { P2P_MEDIA_LOADER_PEER_VERSION, VIDEO_LIVE } from '@server/initializers/
 import { UserModel } from '@server/models/user/user'
 import { VideoModel } from '@server/models/video/video'
 import { VideoLiveModel } from '@server/models/video/video-live'
+import { VideoLiveSessionModel } from '@server/models/video/video-live-session'
 import { VideoStreamingPlaylistModel } from '@server/models/video/video-streaming-playlist'
-import { MStreamingPlaylistVideo, MVideo, MVideoLiveVideo } from '@server/types/models'
+import { MStreamingPlaylistVideo, MVideo, MVideoLiveSession, MVideoLiveVideo } from '@server/types/models'
 import { wait } from '@shared/core-utils'
-import { VideoState, VideoStreamingPlaylistType } from '@shared/models'
+import { LiveVideoError, VideoState, VideoStreamingPlaylistType } from '@shared/models'
 import { federateVideoIfNeeded } from '../activitypub/videos'
 import { JobQueue } from '../job-queue'
 import { generateHLSMasterPlaylistFilename, generateHlsSha256SegmentsFilename, getLiveReplayBaseDirectory } from '../paths'
@@ -174,10 +175,13 @@ class LiveManager {
     return !!this.rtmpServer
   }
 
-  stopSessionOf (videoId: number) {
+  stopSessionOf (videoId: number, error: LiveVideoError | null) {
     const sessionId = this.videoSessions.get(videoId)
     if (!sessionId) return
 
+    this.saveEndingSession(videoId, error)
+      .catch(err => logger.error('Cannot save ending session.', { err, ...lTags(sessionId) }))
+
     this.videoSessions.delete(videoId)
     this.abortSession(sessionId)
   }
@@ -274,6 +278,8 @@ class LiveManager {
     const videoUUID = videoLive.Video.uuid
     const localLTags = lTags(sessionId, videoUUID)
 
+    const liveSession = await this.saveStartingSession(videoLive)
+
     const user = await UserModel.loadByLiveId(videoLive.id)
     LiveQuotaStore.Instance.addNewLive(user.id, videoLive.id)
 
@@ -299,24 +305,27 @@ class LiveManager {
         localLTags
       )
 
-      this.stopSessionOf(videoId)
+      this.stopSessionOf(videoId, LiveVideoError.BAD_SOCKET_HEALTH)
     })
 
     muxingSession.on('duration-exceeded', ({ videoId }) => {
       logger.info('Stopping session of %s: max duration exceeded.', videoUUID, localLTags)
 
-      this.stopSessionOf(videoId)
+      this.stopSessionOf(videoId, LiveVideoError.DURATION_EXCEEDED)
     })
 
     muxingSession.on('quota-exceeded', ({ videoId }) => {
       logger.info('Stopping session of %s: user quota exceeded.', videoUUID, localLTags)
 
-      this.stopSessionOf(videoId)
+      this.stopSessionOf(videoId, LiveVideoError.QUOTA_EXCEEDED)
+    })
+
+    muxingSession.on('ffmpeg-error', ({ videoId }) => {
+      this.stopSessionOf(videoId, LiveVideoError.FFMPEG_ERROR)
     })
 
-    muxingSession.on('ffmpeg-error', ({ sessionId }) => this.abortSession(sessionId))
     muxingSession.on('ffmpeg-end', ({ videoId }) => {
-      this.onMuxingFFmpegEnd(videoId)
+      this.onMuxingFFmpegEnd(videoId, sessionId)
     })
 
     muxingSession.on('after-cleanup', ({ videoId }) => {
@@ -324,7 +333,7 @@ class LiveManager {
 
       muxingSession.destroy()
 
-      return this.onAfterMuxingCleanup({ videoId })
+      return this.onAfterMuxingCleanup({ videoId, liveSession })
         .catch(err => logger.error('Error in end transmuxing.', { err, ...localLTags }))
     })
 
@@ -365,15 +374,19 @@ class LiveManager {
     }
   }
 
-  private onMuxingFFmpegEnd (videoId: number) {
+  private onMuxingFFmpegEnd (videoId: number, sessionId: string) {
     this.videoSessions.delete(videoId)
+
+    this.saveEndingSession(videoId, null)
+      .catch(err => logger.error('Cannot save ending session.', { err, ...lTags(sessionId) }))
   }
 
   private async onAfterMuxingCleanup (options: {
     videoId: number | string
+    liveSession?: MVideoLiveSession
     cleanupNow?: boolean // Default false
   }) {
-    const { videoId, cleanupNow = false } = options
+    const { videoId, liveSession: liveSessionArg, cleanupNow = false } = options
 
     try {
       const fullVideo = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
@@ -381,13 +394,25 @@ class LiveManager {
 
       const live = await VideoLiveModel.loadByVideoId(fullVideo.id)
 
+      const liveSession = liveSessionArg ?? await VideoLiveSessionModel.findCurrentSessionOf(fullVideo.id)
+
+      // On server restart during a live
+      if (!liveSession.endDate) {
+        liveSession.endDate = new Date()
+        await liveSession.save()
+      }
+
       JobQueue.Instance.createJob({
         type: 'video-live-ending',
         payload: {
           videoId: fullVideo.id,
+
           replayDirectory: live.saveReplay
             ? await this.findReplayDirectory(fullVideo)
             : undefined,
+
+          liveSessionId: liveSession.id,
+
           publishedAt: fullVideo.publishedAt.toISOString()
         }
       }, { delay: cleanupNow ? 0 : VIDEO_LIVE.CLEANUP_DELAY })
@@ -445,6 +470,23 @@ class LiveManager {
     return playlist.save()
   }
 
+  private saveStartingSession (videoLive: MVideoLiveVideo) {
+    const liveSession = new VideoLiveSessionModel({
+      startDate: new Date(),
+      liveVideoId: videoLive.videoId
+    })
+
+    return liveSession.save()
+  }
+
+  private async saveEndingSession (videoId: number, error: LiveVideoError | null) {
+    const liveSession = await VideoLiveSessionModel.findCurrentSessionOf(videoId)
+    liveSession.endDate = new Date()
+    liveSession.error = error
+
+    return liveSession.save()
+  }
+
   static get Instance () {
     return this.instance || (this.instance = new this())
   }
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